Sand cutting and screening mechanism



H. L. WADSWORTH.

SAND cunme AND SCREENING MECHANISM. APPLICATION FILED APR. I2, 1917.

1,332,939. r Patented Mar.9,1920.

2 SHEETS-SHEET 1.

/N WEN TOE Howard L H qasrrorfi H. L. WADSWORTH.

SAND CUTTING AND SCREENING MECHANISM.

APPLICATION FILED APR-12,19]?- 1,332,939. Patented Mar. 9, 1920.

2 SHEETSSHEET 2..

. .5 /3 772 4 70MB v UNITED STATES PATENT OFFICE. HOWARD L. VTAbSWORTH,0F CLEVELAND, OHIO, ASSIGNOR T0 SAND MIXING MACIIINE COMPANYINCORPORATED, OF NEW YQRK, N. Y., A CORPORATION OF OHIO.

SAND CUTTING AND scannnme MECHANISM.

Specification of Letters Patent. Patented Mar. 9, 1920.

Application filed April 12; 1917. Serial No. 161,386.

To all whom it may concern:

Be it known that I, HOWARD -L. WADS- WORTH, a citizen of the UnitedStates, and

indicated to a device for cutting and screen-' ing sand, have moreparticular re ard to a machine designed to be used in oundries forcutting molding sand after it comes from the molds and at the same timefor screening the sand to remove therefrom the various sprues and otherarticles which are always left in this sand.' The machine is furtheradapted to be automatically operated when moved over a sand pile. To theaccomplishment of the foregoing and re-' lated ends, said invention,then, consists of the means hereinafter fully described and particularlypointed out in the claims.

The annexed drawing and the following description set forth in detailcertain mechanism embodying the invention, such disclosed meansconstituting, however, but one of various mechanical forms in which theprinciple of the invention may be used.

In said annexed drawings Figure 1 is a side elevation of my improvedmachine, showing the same in operation upon a sand pile; Fig. 2 is anend elevation of the same from the front; Fig.

3 is a plan view of the machine; and Fig.

4 is a section on the line 4 -4, Fig. 1.

Several machines have been desi ed and are in use for renovating orcutting used molding, sand, such machines beingof two The machines ofone type screening being efl'ected without the necessity of raising thesand to any great height and without requiring any complicated orexpensive machinery for this purpose.

The general constructionof the machine is best seen in Fig. 1, themachine consisting 'of a vehicle or framework which is movable over theground and which consists of side and end members '1 and 2 respectivelyconnected together to form a rectangular framework, upon which aremounted vertical members 3, which are in turn connected together byother side and end members, thus forming an open boxlike framework ofconsiderable strength. This frame is mounted upon suitablewheels 4,these wheels bearing sprockets 5, which are driven by means of chains 51operated from a sprocket 15 on a shaft 7 'on which there is mounted asuitable source of power, such, for example, as an electric motor 8.Adjacent to this motor 8 is a platform 9 supported by the upper" membersof the frame upon which the operatorniay stand and control the operationof the vehicle.

The controlling devices, such as the switches for the motors, if one is.used, and the clutches (to be described presently),are groupedconvenient to this platform, but it is not considered necessary to showsuch elements or their mounting in detail, and in themselves they formnopart of the present invention.

Mounted at the forward end of. the frame is an inclined surface formedby a hinged scoop 10, provided with small supporting rollers 50 at itsforward end and adapted to rest upon the floor over which the vehicle isto move. The scoop is hinged about an axis 12 and is thus adapted to beswung up when not in use. Mounted above and adjacent to. the upper endof the inclined surface 10 is a cutter consisting of a plurality ofcurved blades 13 mounted to form a cylinder, this cylinder beingrotatably supported in the frame and being driven by means of chains 14operated over sprockets 15 on the shaft 7 and other sprockets 16 on thecylinder. The function of this cutter is to cut or,mix sand which iselevated by means of the inclined surface 10 and to throw the samerearwardly. In order to more thoroughly break up any lumps in the sandwhich may be missed by the cutter, and to remove articles 'WhlCh maycollect tending portion having a slot 23 therein in' which operates acrank-pin 55 mounted on a sprocket 25'. The latter is carried on a shortshaft in the form af a pin 24 set in a downwardly extending lug 56attached to the side bar 1. The sprocket is operated by a chain 26driven from a sprocket 57 on the shaft 7. and it will be understood thateither one or more sprockets may be used to operate the screen, althoughI have here shown two such driving means. A shaking motion is thus givento the screen and the sand which is deposited thereon is veryfinely'broken up and is sifted down on to the floor between the wheelsof the vehicle and forms a sand pile 28 asindicated in Fig. 1. r

Between the screen 20 and the cutting cylinder 12 'is a box 29 mountedbelow the level of the screen and adapted to receive articles such aspouring sprues, clamps and other small articles, which unavoidably getinto the molding sand. These same articles, having considerable weight,are not usually. thrown onto the screen'by rotation of the cuttingcylinder, but fall, as soon as they leave this cylinder, into this box26 from which they may be removed at intervals.

The form of the inclined surface is indicated in Fig. 3, the surface ofthis scoop being preferably narrowed at its upper end so that it liesbetween the ends of the cutting cylinder 13, thus insuring that all ofthe sand raised bythis scoop is operated on by the cylinder. For thesame reason the screen 20 is made wider than the cutting cylinder inorder that it will receive all of the sand thrown backward from thiscylinder, even though the sand is directed slightly toward one side orthe other, and thus all of the sand which passes through the machine isboth out by the blades of the cylinder and sifted by the shaking actionof the screen. The sides and end of the screen are extended upward toprevent the falling of material.

The operation of the machine is controlled from the operators platform 9by means of clutches 30- which control the connection of the sprockets 8with the shaft 7 so that the machine may be eithenmoved over the floorand the'cutting cylinder operating simultaneously so that the forwardmovement of the machine may be stopped for the purpose of handing anunusual amount of sand which may be before the cutting cylinder Forconvenience both clutches are connected by arms 31 extending to, andoperated by a pivoted handle 32. In this way the machine Leas es isadapted to handle without difficulty any inequalities in. the sand, pilewhich would otherwise cause the machine to choke up, or to pass the sandtherethrough after prop erl mixing and screening it.

gther modes of applying the principle of my invention may be employedinstead of the one explained, change being made as regards the mechanismherein disclosed, provided the means stated by any of the followingclaims or the equivalent of such stated means be employed.

Ithere'fore particularly point out and distinctly claim as my invention.

1. In a machine of the character described, the combination of a vehiclemovable over the floor, an inclined sand feeding scoop mounted on saidvehicle with one end resting upon the floor, a rotatable mixing cylindermounted in said vehicle, and adapted to receive and agitate sandfromvthe ,top of said scoop, and a horizontal screen mounted in saidvehicle to the rear of said cylinder anti adapted to catch the sanddistributed from said cylinder, whereby all the sand is cut and screenedin a horizontal plane above the floor. 7

2. In a machine of the character described,

the combination of a vehicle movable over .material from such sand.

3. In a machine of the character described, the combination of a vehiclemovable over the floor and provided with wheels and a raised frame, aninclined sand feeding scoop mounted on said vehicle with one end restingon the floor, a rotatable mixing cylinder mounted in said frame andadapted toreceive and agitate sand from the top of said scoop and ahorizontal screen carried by said rame to the rear of-said'cylinder andadapted to catch the sand distributed in a horizontal plane above thefloor.

a. In a machine of the character described,

the combination'of a vehicle movable over the floor and provided withwheels and a raised frame, an inclined sand feeding scoop mounted onsaid vehicle with one end resting on the floor, a rotatable mixingcylinder mounted in said frame and adapted to re ceive and agitate sandfrom the top of said scoop, and a receptacle mounted in said vehiclebetween said screen and said cylinder and adapted to collect extraneousarticles in such sand.

Signed by me, this 23rd day of March HOWARD L. WADSWORTH.

